Sounder for telegraph-circuits.



F. asn/HTH @Lua ROY Hmm. SOUNDER FOR TELEGRAPH CIRCUHS Platented J une 1.1, 1918.

FRED E.

sMITH AED LE non HEELIN, OE FAIRFAX, OKLAHOMA.

SOUNDER FOR TELEGRAPH-CIRCUITS.

Specification of Letters Patent.

Patented J une 11, 1918.

Application filed July 28, 1917. Serial No. 183,332.

To all whom t may concern:

Be it known that we, FRED E. SMITH and LE ROY HEFLIN, citizens of the United States, and residents of Fairfax, in the county of Osage and State of Oklahoma, have invented a `new and useful Improve- `ment in Sounders for rfelegraph-Circuits,

of which the following is a specication.

Our invention relates to improvements in Sounders for telegraph circuits and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of our invention is to provide amain line sounder which obviates the necessity of a local circuit.

A. further object of our invention is to provide a device which embodies all the features of a loud sounder, while at the same time retaining all the quick adjustment features of the standard relay.

A further object of oui invention is to provide a sounder having two sets of coils and two armatures, the coils being connected in series and the armatures being connected so that they work synchronously, the force of one magnet being added to that of the other.

A further object of our invention is to provide a device of the type described having a sounder which can be operated in a vertical position in a resonator the same -as the ordinary local battery sounder but which is operated by the current from the main line.

Other objects and advantages will appear in the following specification and the novel features of the invention will be particularly pointed out in the appended claims.

Our invention is illustrated in the accompanying drawings, forming partof this application, in which,

Figure 1 is a plan view of the device,

Fig. 2 is a sectional view on the line 2 2 of Fig. 1,

Fig. 3 between the two armatures,

Fig. 4. is a diagrammatic view of the circuits,

Fig.' 5 is a detail view showing a portion of the means for connecting the two armatures.

In carrying out our invention we provide a base 1 upon which is mounted a sounder which we have designated in general at S.

is a detail view showing connection This sounder has the usual coils 2, armature 3 and bar t. The latter is pivoted at 5 on the yoke 6 and is provided with a downwardly extending screw 7 on its underside and with an adjustable spring 8 on its upper side. At C is a second pair of coils. rihcse coils are slidably mounted on a rod 9 which passes through a support 10 and whose threaded end 11 has a nut 12. A spring 13 bears at one end on the cross bar 14 which joins the core pieces of the coils and at the other end on the support 10. Near the opposite end of the coils they are further supported by a standard 15 which has an adjustable cross plate 16 at its top, there being supporting lugs 17 underneath the coils to permit the movement of the coils when the nut 12 is turned.

rihe armature .for the coils C is shown at 18. It is pivoted on a U-shaped bar 19 secured to the base 1. The armature 18 is connected with the lscrew 7 by means of a spring 20, and a pull-wire 20X. Thelattcr is provided at one end with a loop which encircles the screw bolt 7,'and at the other end with an eye which is engaged by a hook 18a secured to the armature 18.

It vwill be obvious that there will be slight play at the end of the pull wire, since the armatures move in arcs of circles. In order to permit this." we loop one end of the pull wire around the screw 7 as described, and attach the other end by means of an eye to the hook 18a. The spring 2O serves to keep the pull wire taut so that the device has the advantage of a 'Hexible pull wire and at the same time lost motion is obviated since the spring bears at one end on the armature 18 and the other end on the screw bolt 7 This construction insures the instant and synchronous action of both armatures.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

The coils C are connected with the coils of the sounder S in series. In Fig. 4i the main line circuit is shown at L, the coils being shown in series with this main line circuit. It is obvious that the coils C as well as the coils of' the sounder S will be energized and this will cause the movement of both armatures 18 and 8, the connection of the armatures through the medium of the spring 2O and a pull-wire 20'X serving to make the effect ol the two armatures cumulative, thus giving strong throw to the sounding bar 4 and sending iorth a sound which is amply sullicient for ordinary purposes.

It will be noted that the sounder coils are in a vertical position while the coils C are in horizontal position with an armature which is pivoted on a horizontal axis. The device as described has this feature over the ordinary sounder, that is to say, that in unfavorable weather, when there is a tendency :tor the armature to stick, the mere adjustment of the horizontal coils by means of the nut l2 is snllici ent to overcome this tendency, thus obviating any necessity whatever of adjusting the armature 3.

llVe further call attention to the fact that in the present instance we have shown two pairs ot' coils bearing wire with the resistance of two hundred ohms. rl`his construction enables the cores of the coils to reach their maximum strength to demagnctize more quickly. ln view of the lact that the two magnets are thus working in synchronism, a stronger and quicker action is obtained than in an ordinary main line sounder with one set of coils.

1. The combination of a telegraph sounder having actuating coils and a sounder bar, an auxiliary magnet having an individual movablearmature, and means for connecting said movable armature with the sounder bar or the sounder to aid the latter in its movement.

2. The combination of a telegraph sounder having actuating coils and a sounder bar, an auxiliary magnet having an individual movable armature, means for connecting said movable armatilre with the sounder bar of the sounder to aid the latter in its movement, and means l'or adjusting the position of the coil ot the auxiliary magnet with respect to its armature.

8. The combination of a telegraph sounder having actuating coils and a sounder bar, an auxiliary magnet having an individual movable armature, a pull wire having ilexible connection with the armature of the auxiliary magnet 'and being connected to the sounder, and a spring for keeping the l[lexi- Copies of this patent may be obtained for ve `cents each,

Washington, .(1.

ble pull wire taut at all times to prevent lost motion.

4. The combination of a telegraph sounder having actuating coils and a sounder bar, an auxiliary magnet having an individual movable armature, a pull wire having ilexilole connection with the armature of the auxiliary magnet and being connected to the sounder, a spring 'for keeping the flexible pull wire taut at all times to prevent lost motion, and means for adjusting the coil oit the auxiliary magnet toward and away troni its armature.

5. The combination of a telegraph sounder having actuating coils and ya sounder bar, an auxiliary magnet having a movable armature, means for connecting said movable armature with the sounder bar of the sounder to aid the latter in its movement, and means for moving the coils of the auxiliary magnet toward and away from its armature.

6. In combination with la sounder having coils, an armature for the sounder, a sounding bar connected to said armature and being provided with an arm, an auxiliary magnet having a pivoted armature, a pull-wire and spring connecting the armature of the auxiliary magnet with the armof the sounder bar and means tor adjusting the coil of the auxiliary magnet toward and away from its armature. i

7. In combination with a sounder having coils, an armature for the sounder, a sounding bar connected to said armature and being provided with an arm, an auxiliary magnet havingl a pivoted armature, a pullwire and spring connecting 'the armature ott the auxiliary magnet with the arm, the sounder bar and means Jfor adjusting the coil ot" they auxiliary magnet toward and away from its armature, said means comprising a slidable bar for supporting the coil or' the auxiliary magnet, a standard for supporting the slidalole bar, a spring disposed between the coil and the standard and a nut on the end of the slidable bar for adj usting the position oli the bar.

FRED E. SMITH. LE ROY HEFLN. l/Yitnesses:

Louis Srooxnan, Jr., Lnwrs W. SMITH.

by addressing the Commissioner-of Patents. 

